SMA SC 200 - Manual (Page 14)

Grid Security Management SMA Solar Technology AG
14 SC-BEN100262 User Manual
3 Grid Security Management
3.1 What are the requirements?
In Germany, PV systems with an installed capacity of more than 100 kWp must participate in feed
and grid security management. First and foremost, the utility operator must be able to limit the power
of the PV system by remote control, and temporarily reduce it to zero in critical cases. Relevant control
commands from the utility operator must therefore be transmitted quickly and reliably to the Sunny
Central.
The requirements in detail
• Reception of the setpoint via a centralized ripple control signal receiver with 2 or 4 relays.
• Limitation of the feed-in power in 4 configurable stages (for example, 0 % / 30 % / 60 % /
100 % of the agreed installed active power P
AV
).
• Setting of the required setpoint in less than a minute.
3.2 Active Power Limitation
Under certain circumstances, the grid operator is entitled to dictate a temporary limitation of feed-in
power or to implement a system shutdown. According to the Medium-Voltage Directive, generator
systems must be able to reduce their active power in stages of no more than 10 % of the agreed
installed active power P
AV
. However, the four staged reductions of 100 %, 60 %, 30 % and 0 % of
the connected system power have become standard practice.